1 files changed, 254 insertions, 0 deletions
diff --git a/cache/bug_subcache.go b/cache/bug_subcache.go
new file mode 100644
index 00000000..920fe1dc
--- /dev/null
+++ b/cache/bug_subcache.go
@@ -0,0 +1,254 @@
+package cache
+
+import (
+	"errors"
+	"sort"
+	"time"
+
+	"github.com/MichaelMure/git-bug/entities/bug"
+	"github.com/MichaelMure/git-bug/entities/identity"
+	"github.com/MichaelMure/git-bug/entity"
+	"github.com/MichaelMure/git-bug/query"
+	"github.com/MichaelMure/git-bug/repository"
+)
+
+type RepoCacheBug struct {
+	*SubCache[*bug.Bug, *BugExcerpt, *BugCache]
+}
+
+func NewRepoCacheBug(repo repository.ClockedRepo,
+	resolvers func() entity.Resolvers,
+	getUserIdentity getUserIdentityFunc) *RepoCacheBug {
+
+	makeCached := func(b *bug.Bug, entityUpdated func(id entity.Id) error) *BugCache {
+		return NewBugCache(b, repo, getUserIdentity, entityUpdated)
+	}
+
+	makeIndexData := func(b *BugCache) []string {
+		snap := b.Snapshot()
+		var res []string
+		for _, comment := range snap.Comments {
+			res = append(res, comment.Message)
+		}
+		res = append(res, snap.Title)
+		return res
+	}
+
+	actions := Actions[*bug.Bug]{
+		ReadWithResolver:    bug.ReadWithResolver,
+		ReadAllWithResolver: bug.ReadAllWithResolver,
+		Remove:              bug.Remove,
+		MergeAll:            bug.MergeAll,
+	}
+
+	sc := NewSubCache[*bug.Bug, *BugExcerpt, *BugCache](
+		repo, resolvers, getUserIdentity,
+		makeCached, NewBugExcerpt, makeIndexData, actions,
+		bug.Typename, bug.Namespace,
+		formatVersion, defaultMaxLoadedBugs,
+	)
+
+	return &RepoCacheBug{SubCache: sc}
+}
+
+// ResolveBugCreateMetadata retrieve a bug that has the exact given metadata on
+// its Create operation, that is, the first operation. It fails if multiple bugs
+// match.
+func (c *RepoCacheBug) ResolveBugCreateMetadata(key string, value string) (*BugCache, error) {
+	return c.ResolveMatcher(func(excerpt *BugExcerpt) bool {
+		return excerpt.CreateMetadata[key] == value
+	})
+}
+
+// ResolveComment search for a Bug/Comment combination matching the merged
+// bug/comment Id prefix. Returns the Bug containing the Comment and the Comment's
+// Id.
+func (c *RepoCacheBug) ResolveComment(prefix string) (*BugCache, entity.CombinedId, error) {
+	bugPrefix, _ := entity.SeparateIds(prefix)
+	bugCandidate := make([]entity.Id, 0, 5)
+
+	// build a list of possible matching bugs
+	c.mu.RLock()
+	for _, excerpt := range c.excerpts {
+		if excerpt.Id().HasPrefix(bugPrefix) {
+			bugCandidate = append(bugCandidate, excerpt.Id())
+		}
+	}
+	c.mu.RUnlock()
+
+	matchingBugIds := make([]entity.Id, 0, 5)
+	matchingCommentId := entity.UnsetCombinedId
+	var matchingBug *BugCache
+
+	// search for matching comments
+	// searching every bug candidate allow for some collision with the bug prefix only,
+	// before being refined with the full comment prefix
+	for _, bugId := range bugCandidate {
+		b, err := c.Resolve(bugId)
+		if err != nil {
+			return nil, entity.UnsetCombinedId, err
+		}
+
+		for _, comment := range b.Snapshot().Comments {
+			if comment.CombinedId().HasPrefix(prefix) {
+				matchingBugIds = append(matchingBugIds, bugId)
+				matchingBug = b
+				matchingCommentId = comment.CombinedId()
+			}
+		}
+	}
+
+	if len(matchingBugIds) > 1 {
+		return nil, entity.UnsetCombinedId, entity.NewErrMultipleMatch("bug/comment", matchingBugIds)
+	} else if len(matchingBugIds) == 0 {
+		return nil, entity.UnsetCombinedId, errors.New("comment doesn't exist")
+	}
+
+	return matchingBug, matchingCommentId, nil
+}
+
+// Query return the id of all Bug matching the given Query
+func (c *RepoCacheBug) Query(q *query.Query) ([]entity.Id, error) {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+
+	if q == nil {
+		return c.AllIds(), nil
+	}
+
+	matcher := compileMatcher(q.Filters)
+
+	var filtered []*BugExcerpt
+	var foundBySearch map[entity.Id]*BugExcerpt
+
+	if q.Search != nil {
+		foundBySearch = map[entity.Id]*BugExcerpt{}
+
+		index, err := c.repo.GetIndex("bugs")
+		if err != nil {
+			return nil, err
+		}
+
+		res, err := index.Search(q.Search)
+		if err != nil {
+			return nil, err
+		}
+
+		for _, hit := range res {
+			id := entity.Id(hit)
+			foundBySearch[id] = c.excerpts[id]
+		}
+	} else {
+		foundBySearch = c.excerpts
+	}
+
+	for _, excerpt := range foundBySearch {
+		if matcher.Match(excerpt, c.resolvers()) {
+			filtered = append(filtered, excerpt)
+		}
+	}
+
+	var sorter sort.Interface
+
+	switch q.OrderBy {
+	case query.OrderById:
+		sorter = BugsById(filtered)
+	case query.OrderByCreation:
+		sorter = BugsByCreationTime(filtered)
+	case query.OrderByEdit:
+		sorter = BugsByEditTime(filtered)
+	default:
+		return nil, errors.New("missing sort type")
+	}
+
+	switch q.OrderDirection {
+	case query.OrderAscending:
+		// Nothing to do
+	case query.OrderDescending:
+		sorter = sort.Reverse(sorter)
+	default:
+		return nil, errors.New("missing sort direction")
+	}
+
+	sort.Sort(sorter)
+
+	result := make([]entity.Id, len(filtered))
+
+	for i, val := range filtered {
+		result[i] = val.Id()
+	}
+
+	return result, nil
+}
+
+// ValidLabels list valid labels
+//
+// Note: in the future, a proper label policy could be implemented where valid
+// labels are defined in a configuration file. Until that, the default behavior
+// is to return the list of labels already used.
+func (c *RepoCacheBug) ValidLabels() []bug.Label {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+
+	set := map[bug.Label]interface{}{}
+
+	for _, excerpt := range c.excerpts {
+		for _, l := range excerpt.Labels {
+			set[l] = nil
+		}
+	}
+
+	result := make([]bug.Label, len(set))
+
+	i := 0
+	for l := range set {
+		result[i] = l
+		i++
+	}
+
+	// Sort
+	sort.Slice(result, func(i, j int) bool {
+		return string(result[i]) < string(result[j])
+	})
+
+	return result
+}
+
+// New create a new bug
+// The new bug is written in the repository (commit)
+func (c *RepoCacheBug) New(title string, message string) (*BugCache, *bug.CreateOperation, error) {
+	return c.NewWithFiles(title, message, nil)
+}
+
+// NewWithFiles create a new bug with attached files for the message
+// The new bug is written in the repository (commit)
+func (c *RepoCacheBug) NewWithFiles(title string, message string, files []repository.Hash) (*BugCache, *bug.CreateOperation, error) {
+	author, err := c.getUserIdentity()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return c.NewRaw(author, time.Now().Unix(), title, message, files, nil)
+}
+
+// NewRaw create a new bug with attached files for the message, as
+// well as metadata for the Create operation.
+// The new bug is written in the repository (commit)
+func (c *RepoCacheBug) NewRaw(author identity.Interface, unixTime int64, title string, message string, files []repository.Hash, metadata map[string]string) (*BugCache, *bug.CreateOperation, error) {
+	b, op, err := bug.Create(author, unixTime, title, message, files, metadata)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = b.Commit(c.repo)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	cached, err := c.add(b)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return cached, op, nil
+}